Be more specific, is it the inner or outer boot, the inner boot is easy, I replaced both of my outer boots this past summer. Not hard, but like the other guy said, not as easy as changing your oil, boot kit only costs around $15 though. Do a search, lots of info here on the site.

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2002 X5 4.6is
1999 C5 Corvette
1992 Mitsubishi 3000GT VR-4
1994 Kawasaki ZX-9R
2005 Mazda 6 Wagon (Wife's)
1991 Mitsubishi 3000GT VR-4